I was training with my cousin yesterday, we were practicing some kicks, I went to the bathroom and when I came back my cousin told me his leg was hurting, when were were doing some back kicks,apparently he injured his standing leg, a pulled muscle or something. Of course we had to stop training, he couldn't walk normally because it caused pain.
I think that injuries just happen when training, but I think that a better warm up would've prevented it, also when I think about it, he was leaning to far back when doing the kick in order to kick higher, which I think caused him to put to much strain on his standing leg which may have been a cause of the injury.
I think it's always important to take all the precautions necessary in order to prevent injuries, warm up as long as it takes, and just don't force anything to much, I'd rather train at a moderate intensity instead of pushing too hard and getting injured, and to listen to our bodies, be aware of our sensations, since I was practicing too I didn't told him that he was leaning to far back, which I probably should've. But well, too late for that, I just hope he gets better soon.